{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:40.491232", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2014-Feb-02_to_2014-Feb-06_237.0_39.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2014020000194}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "February 02 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 06 2014"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 52924.25145327349}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["North Pacific Ocean"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 39.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 237.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.65, 39.25], [-123.75, 39.5], [-123.65, 39.75], [-123.75, 40.0], [-123.53, 40.53], [-123.0, 40.75], [-122.75, 40.65], [-122.5, 40.75], [-121.97, 40.53], [-121.75, 40.0], [-121.85, 39.75], [-121.75, 39.5], [-121.85, 39.25], [-121.82, 39.18], [-121.47, 39.03], [-121.25, 38.5], [-121.37, 38.2], [-120.97, 38.03], [-120.75, 37.5], [-120.85, 37.25], [-120.75, 37.0], [-120.97, 36.47], [-121.5, 36.25], [-122.03, 36.47], [-122.25, 37.0], [-122.15, 37.25], [-122.25, 37.5], [-122.12, 37.8], [-122.25, 37.85], [-122.5, 37.75], [-122.75, 37.85], [-123.0, 37.75], [-123.53, 37.97], [-123.75, 38.5], [-123.65, 38.75], [-123.75, 39.0], [-123.65, 39.25]]]]}, "2014-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.15, 39.25], [-124.25, 39.5], [-124.15, 39.75], [-124.25, 40.0], [-124.03, 40.53], [-123.5, 40.75], [-123.25, 40.65], [-123.0, 40.75], [-122.75, 40.65], [-122.5, 40.75], [-121.97, 40.53], [-121.75, 40.0], [-121.85, 39.75], [-121.75, 39.5], [-121.85, 39.25], [-121.82, 39.18], [-121.47, 39.03], [-121.25, 38.5], [-121.37, 38.2], [-120.97, 38.03], [-120.75, 37.5], [-120.85, 37.25], [-120.75, 37.0], [-120.97, 36.47], [-121.5, 36.25], [-121.75, 36.35], [-122.0, 36.25], [-122.53, 36.47], [-122.68, 36.82], [-123.03, 36.97], [-123.18, 37.32], [-123.53, 37.47], [-123.68, 37.82], [-124.03, 37.97], [-124.25, 38.5], [-124.15, 38.75], [-124.25, 39.0], [-124.15, 39.25]]]]}, "2014-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 39.5], [-124.53, 40.03], [-124.18, 40.18], [-124.03, 40.53], [-123.5, 40.75], [-123.25, 40.65], [-123.0, 40.75], [-122.75, 40.65], [-122.68, 40.68], [-122.65, 40.75], [-122.75, 41.0], [-122.53, 41.53], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.25, 40.5], [-121.47, 39.97], [-121.82, 39.82], [-121.85, 39.75], [-121.75, 39.5], [-121.85, 39.25], [-121.82, 39.18], [-121.47, 39.03], [-121.25, 38.5], [-121.37, 38.2], [-120.97, 38.03], [-120.75, 37.5], [-120.85, 37.25], [-120.75, 37.0], [-120.97, 36.47], [-121.5, 36.25], [-121.75, 36.35], [-122.0, 36.25], [-122.53, 36.47], [-122.68, 36.82], [-123.03, 36.97], [-123.18, 37.32], [-123.53, 37.47], [-123.68, 37.82], [-124.03, 37.97], [-124.25, 38.5], [-124.15, 38.75], [-124.18, 38.82], [-124.53, 38.97], [-124.75, 39.5]]]]}, "2014-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 39.5], [-124.53, 40.03], [-124.18, 40.18], [-124.03, 40.53], [-123.5, 40.75], [-123.25, 40.65], [-123.0, 40.75], [-122.75, 40.65], [-122.68, 40.68], [-122.65, 40.75], [-122.75, 41.0], [-122.53, 41.53], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.25, 40.5], [-121.47, 39.97], [-121.82, 39.82], [-121.85, 39.75], [-121.75, 39.5], [-121.85, 39.25], [-121.82, 39.18], [-121.47, 39.03], [-121.25, 38.5], [-121.37, 38.2], [-120.97, 38.03], [-120.75, 37.5], [-120.97, 36.97], [-121.32, 36.82], [-121.47, 36.47], [-122.0, 36.25], [-122.53, 36.47], [-122.68, 36.82], [-123.03, 36.97], [-123.18, 37.32], [-123.53, 37.47], [-123.68, 37.82], [-124.03, 37.97], [-124.25, 38.5], [-124.15, 38.75], [-124.18, 38.82], [-124.53, 38.97], [-124.75, 39.5]]]]}, "2014-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.75, 39.5], [-124.53, 40.03], [-124.0, 40.25], [-123.75, 40.15], [-123.5, 40.25], [-123.25, 40.15], [-123.0, 40.25], [-122.57, 40.07], [-122.75, 40.5], [-122.65, 40.75], [-122.75, 41.0], [-122.53, 41.53], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.25, 40.5], [-121.47, 39.97], [-122.0, 39.75], [-122.43, 39.93], [-122.32, 39.68], [-121.97, 39.53], [-121.75, 39.0], [-121.97, 38.47], [-122.5, 38.25], [-122.75, 38.35], [-122.82, 38.32], [-122.97, 37.97], [-123.5, 37.75], [-124.03, 37.97], [-124.25, 38.5], [-124.12, 38.8], [-124.53, 38.97], [-124.75, 39.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.5365996165205615}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7450711434503607}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.777359634129539, 5.7959290290250465, 5.30396990757248, 5.220518808067766, 5.273134633426707]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.43442035289473324, 0.5848265156665775, -0.1420912330054307, 0.23222274674327537, 1.8041372904261266]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8348284256030585, -3.434971704398346, -3.8880763200841, -3.9946830026337676, -3.3096456821397098]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.438560037077423, -4.63732471873783, -5.5365996165205615, -5.481751914783899, -4.080347201844745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4367067691787276, -1.473312642807886, -1.641213070562275, -1.6751008696400929, -1.3486458572392728]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.633910484901683, -1.7156188757838817, -2.010278936596478, -2.0823280967999014, -1.489128460127603]}}